Max Capacity Design for Two-Way MIMO Relay Systems

This paper considers a two-way multiple-input multiple-output (MIMO) relay system with multiple relay nodes between two end nodes. A novel iterative approach is introduced for jointly designing the precoders and decoders at the two end nodes, and the processors at the relays to maximize the system capacity. Numerical results for the per-node power constraint show the convergence behavior of the proposed approach and give a performance benchmark for the analog network coding scheme.